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A device for continuously adsorbing and desorbing organic waste gas with activated carbon

A technology of organic waste gas and activated carbon, which is applied in the direction of chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of difficult control and observation of the flow state, easy clogging of adsorbents, and difficult processing, so as to ensure continuity and The effect of stability, good working environment and high degree of automation

Active Publication Date: 2014-10-22
甘肃银光聚银化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the structure of the adsorber and desorber equipment is complicated and the processing is difficult
The flow state inside the equipment is difficult to control and observe, the failure rate is high, and the adsorbent is easy to block in the equipment
In terms of equipment form and efficiency, it can be further improved

Method used

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  • A device for continuously adsorbing and desorbing organic waste gas with activated carbon
  • A device for continuously adsorbing and desorbing organic waste gas with activated carbon
  • A device for continuously adsorbing and desorbing organic waste gas with activated carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] After the waste water in the polycarbonate production flows into the coalescer, the glue is returned to the polycarbonate production. The waste water enters the separation tank and is left to stand for separation. The upper waste water is pumped into the distillation tower for distillation with low pressure steam, and most of the methylene chloride vapor is condensed After returning to the production of polycarbonate, the uncondensed gas at the top of the distillation tower contains a small amount of dichloromethane, generally 500-1000ppm, and now it is introduced as figure 1 The shown activated carbon continuously adsorbs and desorbs organic waste gas devices. The steps are as follows:

[0043] a) After the organic waste gas discharged from the factory passes through the first filter (1) to remove the polycarbonate fragments, it is pressurized by the first fan (2) to the adsorption tower (3) for adsorption. The adsorbent is transported by dense phase pneumatic The upper p...

Embodiment 2

[0049] There is a small amount of toluene in the waste water vapor outside the toluene nitration process, generally 500~1000ppm. figure 1 The shown activated carbon continuously adsorbs and desorbs organic waste gas devices. The steps are as follows:

[0050] a) The organic waste gas discharged from the factory passes through the first filter (1) to remove solid particles, and is pressurized by the first fan (2) to the adsorption tower (3) for adsorption. The adsorbent enters from the upper part by means of dense phase pneumatic conveying. For the adsorption tower (3), the gas inlet pressure is controlled at 0.15~0.30MPa, the gas velocity is controlled at 3~8m / s, and the mixing ratio is 100~300;

[0051] b) Industrial waste gas containing toluene solvent enters from the bottom entrance of the adsorption tower (3). The activated carbon moves down the moving bed. The waste gas passes through the activated carbon freely with low resistance for gas-solid contact. Through reverse multi-...

Embodiment 3

[0055] There is a trace amount of xylene in the exhaust steam outside the xylene nitration process, generally 500~1000ppm. figure 1 The shown activated carbon continuously adsorbs and desorbs organic waste gas devices. The operation steps are as follows:

[0056] a) The organic waste gas discharged from the factory passes through the first filter (1) to remove solid particles, and is pressurized by the first fan (2) to the adsorption tower (3) for adsorption. The adsorbent enters from the upper part by means of dense phase pneumatic conveying. For the adsorption tower (3), the gas inlet pressure is controlled at 0.15~0.30MPa, the gas velocity is controlled at 3~8m / s, and the mixing ratio is 100~300;

[0057] b) Industrial waste gas containing xylene solvent enters from the bottom entrance of the adsorption tower (3). The activated carbon moves down the moving bed. The waste gas passes through the activated carbon with low resistance for gas-solid contact. Through reverse multi-stag...

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Abstract

The invention relates to the technical field of industrial waste gas treatment and particularly relates to a treatment technology for continuously adsorbing an organic solvent in the industrial waste gas and continuously desorbing the solvent. The invention provides a device for continuously adsorbing and desorbing organic waste gas by using active carbon. The device comprises an adsorbing tower (3), a desorbing tower (6), an active carbon fluidization system, and an organic solvent recycling system. The organic waste gas, including methylene dichloride, methylbenzene, dimethylbenzene, benzene and the like, is continuously adsorbed by using the active carbon. The device has the outstanding characteristics that the adsorbing process and the desorbing process can be continuously and synchronously carried out. The organic waste gas and the active carbon are in inverse contact; the gas distribution is uniform; and the particle mobility is good. The active carbon is circularly used in a dense phase pneumatic transmission manner. The device provided by the invention has a simple and stable technique; and the labor intensity of staff and the environment pollution caused by the powder active carbon can be greatly reduced.

Description

Technical field [0001] The invention relates to the technical field of industrial waste gas treatment, in particular to a treatment technology that uses activated carbon to continuously adsorb organic solvents in industrial waste gas and continuously desorb solvents. Background technique [0002] With the rapid development of modern industry, methylene chloride, toluene, xylene, benzene and other aromatic, halogenated hydrocarbons, aldehydes and ketones, esters, alcohols and other organic solvents are widely used in chemical, petrochemical, coating, and medicine , Rubber, resin, printing and other fields. Most of these volatile organic solvents are toxic, and a considerable part of them are eventually discharged into the atmosphere in the form of organic waste gas, causing serious atmospheric pollution. If handled improperly, it will not only cause the loss of raw materials, but also pollute the environment, and even more serious damage to human health. The country's increasing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/10
Inventor 李小利李玉刚马建军郑世清毛志红陈玫君
Owner 甘肃银光聚银化工有限公司
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